微信公眾號支付H5呼叫支付詳解
阿新 • • 發佈：2018-11-20
分享一下我老師大神的人工智慧教程吧。零基礎，通俗易懂！風趣幽默！http://www.captainbed.net/
也歡迎大家轉載本篇文章。分享知識，造福人民，實現我們中華民族偉大復興！
原文地址：http://blog.csdn.net/fengshizty/article/details/45564685
微信公眾號支付
最近專案需要微信支付，然後看了下微信公眾號支付，，雖然不難，但是細節還是需要注意的，用了大半天時間寫了個demo，並且完整的測試了一下支付流程，下面分享一下微信公眾號支付的經驗。
一、配置公眾號微信支付
需要我們配置微信公眾號支付地址和測試白名單。
比如：支付JS頁面的地址為 http://www.xxx.com/shop/pay/
那此處配置www.xxx.com/shop/pay/
二、開發流程
借用微信公眾號支付api(地址 http://pay.weixin.qq.com/wiki/doc/api/index.PHP?chapter=7_4)，我們需要開發的為紅色標記出的。如下：
三、向微信伺服器端下訂單
呼叫統一下單介面，這樣就能獲取微信支付的prepay_id（http://pay.weixin.qq.com/wiki/doc/api/index.php?chapter=9_1）。
在呼叫該介面前有幾個欄位是H5支付必須填寫的openid
3.1 獲取openid
可以通過網頁授權形式（http://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html）
在微信中傳送如下連結
https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx520c15f417810387&redirect_uri=要跳轉的下訂單的url&response_type=code&scope=snsapi_base&state=123#wechat_redirect
3.2 後臺支付
程式碼如下，包含預處理訂單，支付訂單等介面。
[java] view plain copy
- package org.andy.controller;
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.UnsupportedEncodingException;
- import java.util.Date;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Map.Entry;
- import java.util.Random;
- import javax.servlet.ServletInputStream;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.apache.commons.codec.digest.DigestUtils;
- import org.springframework.stereotype.Controller;
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.xmlpull.v1.XmlPullParser;
- import org.xmlpull.v1.XmlPullParserException;
- import org.xmlpull.v1.XmlPullParserFactory;
- import com.fasterxml.jackson.databind.JsonNode;
- import com.gson.oauth.Oauth;
- import com.gson.oauth.Pay;
- import com.gson.util.HttpKit;
- import com.gson.util.Tools;
- import org.andy.util.DatetimeUtil;
- import org.andy.util.JsonUtil;
- import org.andy.util.SessionUtil;
- import org.andy.util.WebUtil;
- @Controller
- @RequestMapping(“/pay”)
- public class WXPayController {
- @RequestMapping(value = “wxprepay”)
- public void jspay(HttpServletRequest request, HttpServletResponse response, String callback) throws Exception {
- // 獲取openid
- String openId = SessionUtil.getAtt(request, ”openId”);
- if (openId == null) {
- openId = getUserOpenId(request);
- }
- String appid = ”wx16691fcb0523c1a4”;
- String partnerid = ”22223670”;
- String paternerKey = ”fjfjfjfjf1234567FFFFFFFFF1234567”;
- String out_trade_no = getTradeNo();
- Map<String, String> paraMap = new HashMap<String, String>();
- paraMap.put(”appid”, appid);
- paraMap.put(”attach”, “測試支付”);
- paraMap.put(”body”, “測試購買Beacon支付”);
- paraMap.put(”mch_id”, partnerid);
- paraMap.put(”nonce_str”, create_nonce_str());
- paraMap.put(”openid”, openId);
- paraMap.put(”out_trade_no”, out_trade_no);
- paraMap.put(”spbill_create_ip”, getAddrIp(request));
- paraMap.put(”total_fee”, “1”);
- paraMap.put(”trade_type”, “JSAPI”);
- paraMap.put(”notify_url”, “http://www.xxx.co/wxpay/pay/appPay_notify.shtml”);
- String sign = getSign(paraMap, paternerKey);
- paraMap.put(”sign”, sign);
- // 統一下單 https://api.mch.weixin.qq.com/pay/unifiedorder
- String url = ”https://api.mch.weixin.qq.com/pay/unifiedorder”;
- String xml = ArrayToXml(paraMap, false);
- String xmlStr = HttpKit.post(url, xml);
- // 預付商品id
- String prepay_id = ”“;
- if (xmlStr.indexOf(“SUCCESS”) != -1) {
- Map<String, String> map = doXMLParse(xmlStr);
- prepay_id = (String) map.get(”prepay_id”);
- }
- Map<String, String> payMap = new HashMap<String, String>();
- payMap.put(”appId”, appid);
- payMap.put(”timeStamp”, create_timestamp());
- payMap.put(”nonceStr”, create_nonce_str());
- payMap.put(”signType”, “MD5”);
- payMap.put(”package”, “prepay_id=” + prepay_id);
- String paySign = getSign(payMap, paternerKey);
- payMap.put(”pg”, prepay_id);
- payMap.put(”paySign”, paySign);
- WebUtil.response(response, WebUtil.packJsonp(callback, JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(payMap)).toString()));
- }
- @RequestMapping(value = “appPay”)
- public void appPay(HttpServletRequest request, HttpServletResponse response, String body, String detail, String total_fee, String spbill_create_ip,
- String notify_url, String trade_type, String callback) throws Exception {
- String appid = ”wx16691fcb0523c1a4”;
- String partnerid = ”22223670”;
- String paternerKey = ”fjfjfjfjf1234567FFFFFFFFF1234567”;
- String out_trade_no = getTradeNo();
- Map<String, String> paraMap = new HashMap<String, String>();
- paraMap.put(”appid”, appid);
- paraMap.put(”body”, body);
- paraMap.put(”mch_id”, partnerid);
- paraMap.put(”nonce_str”, create_nonce_str());
- paraMap.put(”out_trade_no”, out_trade_no);
- paraMap.put(”spbill_create_ip”, spbill_create_ip);
- paraMap.put(”total_fee”, total_fee);
- paraMap.put(”trade_type”, trade_type);
- paraMap.put(”notify_url”, notify_url);
- String sign = getSign(paraMap, paternerKey);
- paraMap.put(”sign”, sign);
- // 統一下單 https://api.mch.weixin.qq.com/pay/unifiedorder
- String url = ”https://api.mch.weixin.qq.com/pay/unifiedorder”;
- String xml = ArrayToXml(paraMap, false);
- String xmlStr = HttpKit.post(url, xml);
- // 預付商品id
- String prepay_id = ”“;
- Map<String, String> map = doXMLParse(xmlStr);
- if (xmlStr.indexOf(“SUCCESS”) != -1) {
- prepay_id = (String) map.get(”prepay_id”);
- }
- String result_code = map.get(”result_code”);
- String err_code_des = map.get(”err_code_des”);
- Map<String, String> payMap = new HashMap<String, String>();
- payMap.put(”appid”, appid);
- payMap.put(”partnerid”, partnerid);
- payMap.put(”prepayid”, prepay_id);
- payMap.put(”package”, “Sign=WXPay”);
- payMap.put(”noncestr”, create_nonce_str());
- payMap.put(”timestamp”, create_timestamp());
- String paySign = getSign(payMap, paternerKey);
- payMap.put(”sign”, paySign);
- payMap.put(”result_code”, result_code);
- payMap.put(”err_code_des”, err_code_des);
- WebUtil.response(response, WebUtil.packJsonp(callback, JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(payMap)).toString()));
- }
- @RequestMapping(“/appPay_notify”)
- public void appPayNotify(HttpServletRequest request, HttpServletResponse response) throws Exception{
- //String xml = ”<xml><appid><![CDATA[wxb4dc385f953b356e]]></appid><bank_type><![CDATA[CCB_CREDIT]]></bank_type><cash_fee><![CDATA[1]]></cash_fee><fee_type><![CDATA[CNY]]></fee_type><is_subscribe><![CDATA[Y]]></is_subscribe><mch_id><![CDATA[1228442802]]></mch_id><nonce_str><![CDATA[1002477130]]></nonce_str><openid><![CDATA[o-HREuJzRr3moMvv990VdfnQ8x4k]]></openid><out_trade_no><![CDATA[1000000000051249]]></out_trade_no><result_code><![CDATA[SUCCESS]]></result_code><return_code><![CDATA[SUCCESS]]></return_code><sign><![CDATA[1269E03E43F2B8C388A414EDAE185CEE]]></sign><time_end><![CDATA[20150324100405]]></time_end><total_fee>1</total_fee><trade_type><![CDATA[JSAPI]]></trade_type><transaction_id><![CDATA[1009530574201503240036299496]]></transaction_id></xml>”;
- response.setCharacterEncoding(”UTF-8”);
- response.setContentType(”text/xml”);
- ServletInputStream in = request.getInputStream();
- String xmlMsg = Tools.inputStream2String(in);
- Map<String, String> map = doXMLParse(xmlMsg);
- String return_code = map.get(”return_code”);
- String return_msg = map.get(”return_msg”);
- map = new HashMap<String, String>();
- map.put(”return_code”, return_code);
- map.put(”return_msg”, return_msg);
- //響應xml
- String resXml = ArrayToXml(map, true);
- response.getWriter().write(resXml);
- }
- @RequestMapping(“/orderquery.do”)
- public void orderquery(HttpServletRequest request, HttpServletResponse response, String transaction_id, String out_trade_no, String callback) throws Exception{
- String url = ”https://api.mch.weixin.qq.com/pay/orderquery”;
- String appid = ”wx16691fcb0523c1a4”;
- String partnerid = ”22223670”;
- String paternerKey = ”fjfjfjfjf1234567FFFFFFFFF1234567”;
- Map<String, String> map = new HashMap<String, String>();
- map.put(”appid”, appid);
- map.put(”mch_id”, partnerid);
- if(transaction_id != null && !transaction_id.equals(“”)){
- map.put(”transaction_id”, transaction_id);
- }else {
- map.put(”out_trade_no”, out_trade_no);
- }
- map.put(”nonce_str”, create_nonce_str());
- String paySign = getSign(map, paternerKey);
- map.put(”sign”, paySign);
- String xml = ArrayToXml(map, false);
- String xmlStr = HttpKit.post(url, xml);
- Map<String, String> orderMap = doXMLParse(xmlStr);
- WebUtil.response(response, WebUtil.packJsonp(callback, JsonUtil.warpJsonNodeResponse(JsonUtil.objectToJsonNode(orderMap)).toString()));
- }
- /**
- * map轉成xml
- *
- * @param arr
- * @return
- */
- public String ArrayToXml(Map<String, String> parm, boolean isAddCDATA) {
- StringBuffer strbuff = new StringBuffer(<xml>);
- if (parm != null ) {
- for (Entry<String, String> entry : parm.entrySet()) {
- strbuff.append(”<”).append(entry.getKey()).append(“>”);
- if (isAddCDATA) {
- strbuff.append(<![CDATA[).append(entry.getValue()).append(]]>);
- }else {
- strbuff.append(entry.getValue());
- }
- strbuff.append(”<”).append(entry.getKey()).append(“>”);
- }
- }
- return strbuff.append(</xml>).toString();
- }
- // 獲取openId
- private String getUserOpenId(HttpServletRequest request) throws Exception {
- String code = request.getParameter(”code”);
- if (code == null) {
- String openId = request.getParameter(”openId”);
- return openId;
- }
- Oauth o = new Oauth();
- String token = o.getToken(code);
- JsonNode node = JsonUtil.StringToJsonNode(token);
- String openId = node.get(”openid”).asText();
- return openId;
- }
- private String create_nonce_str() {
- String chars = ”abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789”;
- String res = ”“;
- for (int i = 0; i < 16; i++) {
- Random rd = new Random();
- res += chars.charAt(rd.nextInt(chars.length() - 1));
- }
- return res;
- }
- private String getAddrIp(HttpServletRequest request){
- return request.getRemoteAddr();
- }
- private String create_timestamp() {
- return Long.toString(System.currentTimeMillis() / 1000);
- }
- private String getTradeNo(){
- String timestamp = DatetimeUtil.formatDate(new Date(), DatetimeUtil.DATETIME_PATTERN);
- return “HZNO” + timestamp;
- }
- private String getSign(Map<String, String> params, String paternerKey )
- throws UnsupportedEncodingException {
- String string1 = Pay.createSign(params, false);
- String stringSignTemp = string1 + ”&key=” + paternerKey;
- String signValue = DigestUtils.md5Hex(stringSignTemp).toUpperCase();
- return signValue;
- }
- private Map<String, String> doXMLParse(String xml)
- throws XmlPullParserException, IOException {
- InputStream inputStream = new ByteArrayInputStream(xml.getBytes());
- Map<String, String> map = null;
- XmlPullParser pullParser = XmlPullParserFactory.newInstance()
- .newPullParser();
- pullParser.setInput(inputStream, ”UTF-8”); // 為xml設定要解析的xml資料
- int eventType = pullParser.getEventType();
- while (eventType != XmlPullParser.END_DOCUMENT) {
- switch (eventType) {
- case XmlPullParser.START_DOCUMENT:
- map = new HashMap<String, String>();
- break;
- case XmlPullParser.START_TAG:
- String key = pullParser.getName();
- if (key.equals(“xml”))
- break;
- String value = pullParser.nextText();
- map.put(key, value);
- break;
- case XmlPullParser.END_TAG:
- break;
- }
- eventType = pullParser.next();
- }
- return map;
- }
- }
wxprepay.shtm介面是預處理訂單介面向微信伺服器下訂單。
appPay.shtml介面是支付介面。
appPay_notify.shtml介面是微信支付後非同步通知結果介面。
orderquery.shtml介面是訂單查詢介面
3.3、涉及到的工具類
SessionUtil.Java工具類
[java] view plain copy
- package org.andy.util;
- import javax.servlet.http.HttpServletRequest;
- public class SessionUtil {
- public static void addAtt(HttpServletRequest request, String key, Object value){
- request.getSession().setAttribute(key, value);
- }
- public static void removeAtt(HttpServletRequest request, String key){
- request.getSession().removeAttribute(key);
- }
- public static String getAtt(HttpServletRequest request, String key){
- return (String)request.getSession().getAttribute(key);
- }
- public static Object getAttObj(HttpServletRequest request, String key){
- return request.getSession().getAttribute(key);
- }
- public static String optAtt(HttpServletRequest request, String key, String value){
- String r = (String)request.getSession().getAttribute(key);
- if (r == null){
- r = value;
- }
- return r;
- }
- }
HttpKit 網路請求工具類
[java] view plain copy
- /**
- * https 請求 微信為https的請求
- *
- * @author andy
- * @date 2015-10-9 下午2:40:19
- */
- public class HttpKit {
- private static final String DEFAULT_CHARSET = “UTF-8”;
- /**
- * @return 返回型別:
- * @throws IOException
- * @throws UnsupportedEncodingException
- * @throws NoSuchProviderException
- * @throws NoSuchAlgorithmException
- * @throws KeyManagementException
- * @description 功能描述: get 請求
- */
- public static String get(String url, Map<String, String> params, Map<String, String> headers) throws